---
cve: "CVE-2026-57997"
severity: "MEDIUM"
cvss: 6.3
epss: "15%"
vendor: "strapi"
kev: false
exploited: false
published: "2026-06-29 22:16:49"
tags: [cve, security, medium]
source: tsecurity.de CVE-Dossier
exported: "2026-09-17T18:35:35+02:00"
---

# CVE-2026-57997

> 6.3 MEDIUM · 🧪 PoC

## Beschreibung

Strapi users-permissions plugin fails to restrict JWT algorithms when plugin::users-permissions.jwt.algorithm is not explicitly configured, allowing acceptance of HS384 and HS512 tokens alongside HS256. Attackers possessing the jwtSecret can mint tokens with non-standard HMAC variants to bypass algorithm restrictions and weaken authentication controls.

## CVSS-Vektor

```
CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N
```

| Metrik | Wert | Bewertung |
|---|---|---|
| AV Angriffsvektor | Netzwerk | bad |
| AC Komplexität | Hoch | good |
| PR Privilegien | Keine | bad |
| UI Interaktion | Keine | bad |

## Patch verfügbar (OSV)

- 4be93cf38bce0ed43eeaa0268b052ba0ef9b239a (Commit)

## Referenzen

- <https://github.com/strapi/strapi/issues/26587>
- <https://github.com/strapi/strapi/pull/26752>
- <https://github.com/strapi/strapi>
- <https://www.vulncheck.com/advisories/strapi-users-permissions-jwt-algorithm-confusion-via-missing-algorithm-configuration>

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/cve?cve=CVE-2026-57997) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI BITS_